It's not about Iran, but there was an interesting article / analysis called "How Censorship in China Allows Government Criticism but Silences Collective Expres

It's not about Iran, but there was an interesting article / analysis called "How Censorship in China Allows Government Criticism but Silences Collective Expression" - you may guess from the title how it answers your question. https://gking.harvard.edu/publications/how-censorship-china-allows-government-criticism-silences-collective-expression https://gking.harvard.edu/publications/how-censorship-china-...